The family of a teenager pictured with knives in a Country Liberals (CLP) "law and order" election video is seeking legal advice about the advertisement, the Northern Territory's peak Aboriginal legal service says.

The video was posted by the CLP candidate for Drysdale Ben Hosking on 27 July and also contains an advertisement about the drug ice, described by the NT auditor-general in February as "factually inaccurate and misleading".

Mr Hosking's advertisement shows the former police officer standing in front of an armoured vehicle, holding an assault rifle in his Territory Response Group (TRG) uniform.

The ads, published late last year, stated Opposition and independent MLAs had blocked proposed laws giving police powers to search cars for the drug ice.

The NT auditor-general Julie Crisp found that to be untrue.

"The [proposed change] had not progressed to the point where it was being debated therefore it is my opinion that the advertisement includes statements that are misleading and factually inaccurate," Ms Crisp's report read.

Ms Crisp recommended the Office of the Chief Minister "implement appropriate quality assurance processes" and take any other action to ensure further instances of using taxpayers' money to promote inaccurate and misleading information did not occur.

A spokeswoman for the Northern Territory Electoral Commission said in a statement the NT Electoral Act does not regulate the content of political messages, only their proper authorisation.

The election period officially begins on August 8, with the issuing of a writ.